Smoke Detector Sensitivity
Smoke Detector Sensitivity
(OP)
Can anyone tell me what year NFPA started requiring sensitivity testing of smoke detectors. I have some simplex smoke detectors dated 1986 with no sensitivity listing on the label. Just wondering if these were made prior to mandated sensitivity testing.





RE: Smoke Detector Sensitivity
Is there an exception in it not to require sensitivity testing, for smoke detectors mad before a certain year??
That is basically your question asked a differ my way, I take?
RE: Smoke Detector Sensitivity
14.4.4.3.4 To ensure that each smoke detector is within its listed and marked sensitivity range, it shall be tested using any of the following methods:
(1)
Calibrated test method
(2)
Manufacturer’s calibrated sensitivity test instrument
(3)
Listed control equipment arranged for the purpose
(4)
Smoke detector/fire alarm control unit arrangement whereby the detector causes a signal at the fire alarm control unit where its sensitivity is outside its listed sensitivity range
(5)
Other calibrated sensitivity test methods approved by the authority having jurisdiction
RE: Smoke Detector Sensitivity
from the commentary
Older detectors manufactured prior to current standards did not require a sensitivity range to be marked on the product. These detectors should have a sensitivity of between 0.5 and 4 percent per foot obscuration (light gray smoke) depending on the type of the detector. Sensitivities less than 0.5 percent obscuration per foot may lead to unwanted alarms, and sensitivities over 4 percent per foot may cause delays in or failure of detection.